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I've just noticed a really annoying high-pitched whine coming from my sideboards whenever the circulator is running. I don't know if it's always been there and I just never noticed it but it's suddenly very loud and noticeable when the house is quiet. The thing is, I had the furnace off all day...

My kohler bathtub has one of those internal stopper systems with no pop-up and just a strainer covering the hole. For tubs that are used for bathing, this seems unsanitary since the germs and nasty gunk in the drain hole have a free path straight into the bath water. Is it possible to retrofit a...

I understand why hot water tanks can deliver water that's hotter for the first minute or so (heat rises to top of tank), but I have tankless hot water from an oil burner and for the first minute the water is very hot (160F) and then sometimes drops down to a much cooler temp (as low as 130-ish)...

I have an oil burner with tankless hot water and a supplemental water heater tank. Recently I started having air spluttering and sometimes violently spitting from all hot water taps in the house. This happened once before due to a bad well pump, but in that case it was from both hot and cold...